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ocfs2: make room for unwritten extents flag 

Due to the size of our group bitmaps, we'll never have a leaf node extent
record with more than 16 bits worth of clusters. Split e_clusters up so that
leaf nodes can get a flags field where we can mark unwritten extents.
Interior nodes whose length references all the child nodes beneath it can't
split their e_clusters field, so we use a union to preserve sizing there.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2007-03-07 16:46:57 -08:00
parent 6af67d8205
commit e48edee2d8
6 changed files with 151 additions and 69 deletions
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155
fs/ocfs2/alloc.c
View File

@ -218,20 +218,32 @@ enum ocfs2_contig_type {
CONTIG_RIGHT
};
/*
* NOTE: ocfs2_block_extent_contig(), ocfs2_extents_adjacent() and
* ocfs2_extent_contig only work properly against leaf nodes!
*/
static int ocfs2_block_extent_contig(struct super_block *sb,
struct ocfs2_extent_rec *ext,
u64 blkno)
{
return blkno == (le64_to_cpu(ext->e_blkno) +
ocfs2_clusters_to_blocks(sb,
le32_to_cpu(ext->e_clusters)));
u64 blk_end = le64_to_cpu(ext->e_blkno);
blk_end += ocfs2_clusters_to_blocks(sb,
le16_to_cpu(ext->e_leaf_clusters));
return blkno == blk_end;
}
static int ocfs2_extents_adjacent(struct ocfs2_extent_rec *left,
struct ocfs2_extent_rec *right)
{
return (le32_to_cpu(left->e_cpos) + le32_to_cpu(left->e_clusters) ==
le32_to_cpu(right->e_cpos));
u32 left_range;
left_range = le32_to_cpu(left->e_cpos) +
le16_to_cpu(left->e_leaf_clusters);
return (left_range == le32_to_cpu(right->e_cpos));
}
static enum ocfs2_contig_type
@ -430,7 +442,7 @@ static inline u32 ocfs2_sum_rightmost_rec(struct ocfs2_extent_list *el)
i = le16_to_cpu(el->l_next_free_rec) - 1;
return le32_to_cpu(el->l_recs[i].e_cpos) +
le32_to_cpu(el->l_recs[i].e_clusters);
ocfs2_rec_clusters(el, &el->l_recs[i]);
}
/*
@ -442,7 +454,7 @@ static inline u32 ocfs2_sum_rightmost_rec(struct ocfs2_extent_list *el)
* for the new last extent block.
*
* the new branch will be 'empty' in the sense that every block will
* contain a single record with e_clusters == 0.
* contain a single record with cluster count == 0.
*/
static int ocfs2_add_branch(struct ocfs2_super *osb,
handle_t *handle,
@ -532,7 +544,12 @@ static int ocfs2_add_branch(struct ocfs2_super *osb,
*/
eb_el->l_recs[0].e_cpos = cpu_to_le32(new_cpos);
eb_el->l_recs[0].e_blkno = cpu_to_le64(next_blkno);
eb_el->l_recs[0].e_clusters = cpu_to_le32(0);
/*
* eb_el isn't always an interior node, but even leaf
* nodes want a zero'd flags and reserved field so
* this gets the whole 32 bits regardless of use.
*/
eb_el->l_recs[0].e_int_clusters = cpu_to_le32(0);
if (!eb_el->l_tree_depth)
new_last_eb_blk = le64_to_cpu(eb->h_blkno);
@ -577,7 +594,7 @@ static int ocfs2_add_branch(struct ocfs2_super *osb,
i = le16_to_cpu(el->l_next_free_rec);
el->l_recs[i].e_blkno = cpu_to_le64(next_blkno);
el->l_recs[i].e_cpos = cpu_to_le32(new_cpos);
el->l_recs[i].e_clusters = 0;
el->l_recs[i].e_int_clusters = 0;
le16_add_cpu(&el->l_next_free_rec, 1);
/* fe needs a new last extent block pointer, as does the
@ -662,11 +679,8 @@ static int ocfs2_shift_tree_depth(struct ocfs2_super *osb,
/* copy the fe data into the new extent block */
eb_el->l_tree_depth = fe_el->l_tree_depth;
eb_el->l_next_free_rec = fe_el->l_next_free_rec;
for(i = 0; i < le16_to_cpu(fe_el->l_next_free_rec); i++) {
eb_el->l_recs[i].e_cpos = fe_el->l_recs[i].e_cpos;
eb_el->l_recs[i].e_clusters = fe_el->l_recs[i].e_clusters;
eb_el->l_recs[i].e_blkno = fe_el->l_recs[i].e_blkno;
}
for(i = 0; i < le16_to_cpu(fe_el->l_next_free_rec); i++)
eb_el->l_recs[i] = fe_el->l_recs[i];
status = ocfs2_journal_dirty(handle, new_eb_bh);
if (status < 0) {
@ -687,12 +701,9 @@ static int ocfs2_shift_tree_depth(struct ocfs2_super *osb,
le16_add_cpu(&fe_el->l_tree_depth, 1);
fe_el->l_recs[0].e_cpos = 0;
fe_el->l_recs[0].e_blkno = eb->h_blkno;
fe_el->l_recs[0].e_clusters = cpu_to_le32(new_clusters);
for(i = 1; i < le16_to_cpu(fe_el->l_next_free_rec); i++) {
fe_el->l_recs[i].e_cpos = 0;
fe_el->l_recs[i].e_clusters = 0;
fe_el->l_recs[i].e_blkno = 0;
}
fe_el->l_recs[0].e_int_clusters = cpu_to_le32(new_clusters);
for(i = 1; i < le16_to_cpu(fe_el->l_next_free_rec); i++)
memset(&fe_el->l_recs[i], 0, sizeof(struct ocfs2_extent_rec));
fe_el->l_next_free_rec = cpu_to_le16(1);
/* If this is our 1st tree depth shift, then last_eb_blk
@ -817,9 +828,13 @@ bail:
return status;
}
/*
* This is only valid for leaf nodes, which are the only ones that can
* have empty extents anyway.
*/
static inline int ocfs2_is_empty_extent(struct ocfs2_extent_rec *rec)
{
return !rec->e_clusters;
return !rec->e_leaf_clusters;
}
/*
@ -930,6 +945,8 @@ static void ocfs2_create_empty_extent(struct ocfs2_extent_list *el)
{
int next_free = le16_to_cpu(el->l_next_free_rec);
BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
if (next_free == 0)
goto set_and_inc;
@ -1034,7 +1051,7 @@ static int __ocfs2_find_path(struct inode *inode,
* rightmost record.
*/
range = le32_to_cpu(rec->e_cpos) +
le32_to_cpu(rec->e_clusters);
ocfs2_rec_clusters(el, rec);
if (cpos >= le32_to_cpu(rec->e_cpos) && cpos < range)
break;
}
@ -1195,21 +1212,21 @@ static void ocfs2_adjust_adjacent_records(struct ocfs2_extent_rec *left_rec,
*/
left_clusters = le32_to_cpu(right_child_el->l_recs[0].e_cpos);
left_clusters -= le32_to_cpu(left_rec->e_cpos);
left_rec->e_clusters = cpu_to_le32(left_clusters);
left_rec->e_int_clusters = cpu_to_le32(left_clusters);
/*
* Calculate the rightmost cluster count boundary before
* moving cpos - we will need to adjust e_clusters after
* moving cpos - we will need to adjust clusters after
* updating e_cpos to keep the same highest cluster count.
*/
right_end = le32_to_cpu(right_rec->e_cpos);
right_end += le32_to_cpu(right_rec->e_clusters);
right_end += le32_to_cpu(right_rec->e_int_clusters);
right_rec->e_cpos = left_rec->e_cpos;
le32_add_cpu(&right_rec->e_cpos, left_clusters);
right_end -= le32_to_cpu(right_rec->e_cpos);
right_rec->e_clusters = cpu_to_le32(right_end);
right_rec->e_int_clusters = cpu_to_le32(right_end);
}
/*
@ -1452,6 +1469,8 @@ static int ocfs2_find_cpos_for_left_leaf(struct super_block *sb,
u64 blkno;
struct ocfs2_extent_list *el;
BUG_ON(path->p_tree_depth == 0);
*cpos = 0;
blkno = path_leaf_bh(path)->b_blocknr;
@ -1486,7 +1505,9 @@ static int ocfs2_find_cpos_for_left_leaf(struct super_block *sb,
}
*cpos = le32_to_cpu(el->l_recs[j - 1].e_cpos);
*cpos = *cpos + le32_to_cpu(el->l_recs[j - 1].e_clusters) - 1;
*cpos = *cpos + ocfs2_rec_clusters(el,
&el->l_recs[j - 1]);
*cpos = *cpos - 1;
goto out;
}
}
@ -1715,7 +1736,7 @@ static void ocfs2_insert_at_leaf(struct ocfs2_extent_rec *insert_rec,
unsigned int range;
struct ocfs2_extent_rec *rec;
BUG_ON(el->l_tree_depth);
BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
/*
* Contiguous insert - either left or right.
@ -1726,8 +1747,8 @@ static void ocfs2_insert_at_leaf(struct ocfs2_extent_rec *insert_rec,
rec->e_blkno = insert_rec->e_blkno;
rec->e_cpos = insert_rec->e_cpos;
}
le32_add_cpu(&rec->e_clusters,
le32_to_cpu(insert_rec->e_clusters));
le16_add_cpu(&rec->e_leaf_clusters,
le16_to_cpu(insert_rec->e_leaf_clusters));
return;
}
@ -1748,7 +1769,8 @@ static void ocfs2_insert_at_leaf(struct ocfs2_extent_rec *insert_rec,
if (insert->ins_appending == APPEND_TAIL) {
i = le16_to_cpu(el->l_next_free_rec) - 1;
rec = &el->l_recs[i];
range = le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters);
range = le32_to_cpu(rec->e_cpos)
+ le16_to_cpu(rec->e_leaf_clusters);
BUG_ON(le32_to_cpu(insert_rec->e_cpos) < range);
mlog_bug_on_msg(le16_to_cpu(el->l_next_free_rec) >=
@ -1761,9 +1783,9 @@ static void ocfs2_insert_at_leaf(struct ocfs2_extent_rec *insert_rec,
le16_to_cpu(el->l_count),
le16_to_cpu(el->l_next_free_rec),
le32_to_cpu(el->l_recs[i].e_cpos),
le32_to_cpu(el->l_recs[i].e_clusters),
le16_to_cpu(el->l_recs[i].e_leaf_clusters),
le32_to_cpu(insert_rec->e_cpos),
le32_to_cpu(insert_rec->e_clusters));
le16_to_cpu(insert_rec->e_leaf_clusters));
i++;
el->l_recs[i] = *insert_rec;
le16_add_cpu(&el->l_next_free_rec, 1);
@ -1805,6 +1827,12 @@ static int ocfs2_append_rec_to_path(struct inode *inode, handle_t *handle,
*ret_left_path = NULL;
/*
* This shouldn't happen for non-trees. The extent rec cluster
* count manipulation below only works for interior nodes.
*/
BUG_ON(right_path->p_tree_depth == 0);
/*
* If our appending insert is at the leftmost edge of a leaf,
* then we might need to update the rightmost records of the
@ -1863,6 +1891,8 @@ static int ocfs2_append_rec_to_path(struct inode *inode, handle_t *handle,
bh = path_root_bh(right_path);
i = 0;
while (1) {
struct ocfs2_extent_rec *rec;
next_free = le16_to_cpu(el->l_next_free_rec);
if (next_free == 0) {
ocfs2_error(inode->i_sb,
@ -1872,16 +1902,19 @@ static int ocfs2_append_rec_to_path(struct inode *inode, handle_t *handle,
goto out;
}
el->l_recs[next_free - 1].e_clusters = insert_rec->e_cpos;
le32_add_cpu(&el->l_recs[next_free - 1].e_clusters,
le32_to_cpu(insert_rec->e_clusters));
le32_add_cpu(&el->l_recs[next_free - 1].e_clusters,
-le32_to_cpu(el->l_recs[next_free - 1].e_cpos));
rec = &el->l_recs[next_free - 1];
rec->e_int_clusters = insert_rec->e_cpos;
le32_add_cpu(&rec->e_int_clusters,
le16_to_cpu(insert_rec->e_leaf_clusters));
le32_add_cpu(&rec->e_int_clusters,
-le32_to_cpu(rec->e_cpos));
ret = ocfs2_journal_dirty(handle, bh);
if (ret)
mlog_errno(ret);
/* Don't touch the leaf node */
if (++i >= right_path->p_tree_depth)
break;
@ -2068,7 +2101,7 @@ static int ocfs2_do_insert_extent(struct inode *inode,
out_update_clusters:
ocfs2_update_dinode_clusters(inode, di,
le32_to_cpu(insert_rec->e_clusters));
le16_to_cpu(insert_rec->e_leaf_clusters));
ret = ocfs2_journal_dirty(handle, di_bh);
if (ret)
@ -2089,6 +2122,8 @@ static void ocfs2_figure_contig_type(struct inode *inode,
int i;
enum ocfs2_contig_type contig_type = CONTIG_NONE;
BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {
contig_type = ocfs2_extent_contig(inode, &el->l_recs[i],
insert_rec);
@ -2120,7 +2155,7 @@ static void ocfs2_figure_appending_type(struct ocfs2_insert_type *insert,
insert->ins_appending = APPEND_NONE;
BUG_ON(el->l_tree_depth);
BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
if (!el->l_next_free_rec)
goto set_tail_append;
@ -2134,7 +2169,8 @@ static void ocfs2_figure_appending_type(struct ocfs2_insert_type *insert,
i = le16_to_cpu(el->l_next_free_rec) - 1;
rec = &el->l_recs[i];
if (cpos >= (le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters)))
if (cpos >=
(le32_to_cpu(rec->e_cpos) + le16_to_cpu(rec->e_leaf_clusters)))
goto set_tail_append;
return;
@ -2242,7 +2278,7 @@ static int ocfs2_figure_insert_type(struct inode *inode,
* The insert code isn't quite ready to deal with all cases of
* left contiguousness. Specifically, if it's an insert into
* the 1st record in a leaf, it will require the adjustment of
* e_clusters on the last record of the path directly to it's
* cluster count on the last record of the path directly to it's
* left. For now, just catch that case and fool the layers
* above us. This works just fine for tree_depth == 0, which
* is why we allow that above.
@ -2310,9 +2346,10 @@ int ocfs2_insert_extent(struct ocfs2_super *osb,
(unsigned long long)OCFS2_I(inode)->ip_blkno, cpos,
OCFS2_I(inode)->ip_clusters);
memset(&rec, 0, sizeof(rec));
rec.e_cpos = cpu_to_le32(cpos);
rec.e_blkno = cpu_to_le64(start_blk);
rec.e_clusters = cpu_to_le32(new_clusters);
rec.e_leaf_clusters = cpu_to_le16(new_clusters);
status = ocfs2_figure_insert_type(inode, fe_bh, &last_eb_bh, &rec,
&insert);
@ -2981,7 +3018,7 @@ static int ocfs2_find_new_last_ext_blk(struct inode *inode,
* Check it we'll only be trimming off the end of this
* cluster.
*/
if (le16_to_cpu(rec->e_clusters) > clusters_to_del)
if (le16_to_cpu(rec->e_leaf_clusters) > clusters_to_del)
goto out;
}
@ -3061,11 +3098,11 @@ find_tail_record:
mlog(0, "Extent list before: record %d: (%u, %u, %llu), "
"next = %u\n", i, le32_to_cpu(rec->e_cpos),
le32_to_cpu(rec->e_clusters),
ocfs2_rec_clusters(el, rec),
(unsigned long long)le64_to_cpu(rec->e_blkno),
le16_to_cpu(el->l_next_free_rec));
BUG_ON(le32_to_cpu(rec->e_clusters) < clusters_to_del);
BUG_ON(ocfs2_rec_clusters(el, rec) < clusters_to_del);
if (le16_to_cpu(el->l_tree_depth) == 0) {
/*
@ -3107,13 +3144,13 @@ find_tail_record:
goto find_tail_record;
}
le32_add_cpu(&rec->e_clusters, -clusters_to_del);
le16_add_cpu(&rec->e_leaf_clusters, -clusters_to_del);
/*
* We'll use "new_edge" on our way back up the
* tree to know what our rightmost cpos is.
*/
new_edge = le32_to_cpu(rec->e_clusters);
new_edge = le16_to_cpu(rec->e_leaf_clusters);
new_edge += le32_to_cpu(rec->e_cpos);
/*
@ -3121,12 +3158,12 @@ find_tail_record:
*/
*delete_start = le64_to_cpu(rec->e_blkno)
+ ocfs2_clusters_to_blocks(inode->i_sb,
le32_to_cpu(rec->e_clusters));
le16_to_cpu(rec->e_leaf_clusters));
/*
* If it's now empty, remove this record.
*/
if (le32_to_cpu(rec->e_clusters) == 0) {
if (le16_to_cpu(rec->e_leaf_clusters) == 0) {
memset(rec, 0,
sizeof(struct ocfs2_extent_rec));
le16_add_cpu(&el->l_next_free_rec, -1);
@ -3152,15 +3189,15 @@ find_tail_record:
if (new_edge == 0)
goto delete;
rec->e_clusters = cpu_to_le32(new_edge);
le32_add_cpu(&rec->e_clusters,
rec->e_int_clusters = cpu_to_le32(new_edge);
le32_add_cpu(&rec->e_int_clusters,
-le32_to_cpu(rec->e_cpos));
/*
* A deleted child record should have been
* caught above.
*/
BUG_ON(le32_to_cpu(rec->e_clusters) == 0);
BUG_ON(le32_to_cpu(rec->e_int_clusters) == 0);
}
delete:
@ -3173,7 +3210,7 @@ delete:
mlog(0, "extent list container %llu, after: record %d: "
"(%u, %u, %llu), next = %u.\n",
(unsigned long long)bh->b_blocknr, i,
le32_to_cpu(rec->e_cpos), le32_to_cpu(rec->e_clusters),
le32_to_cpu(rec->e_cpos), ocfs2_rec_clusters(el, rec),
(unsigned long long)le64_to_cpu(rec->e_blkno),
le16_to_cpu(el->l_next_free_rec));
@ -3195,7 +3232,7 @@ delete:
ocfs2_remove_from_cache(inode, bh);
BUG_ON(le32_to_cpu(el->l_recs[0].e_clusters));
BUG_ON(ocfs2_rec_clusters(el, &el->l_recs[0]));
BUG_ON(le32_to_cpu(el->l_recs[0].e_cpos));
BUG_ON(le64_to_cpu(el->l_recs[0].e_blkno));
@ -3283,7 +3320,7 @@ static int ocfs2_do_truncate(struct ocfs2_super *osb,
* Lower levels depend on this never happening, but it's best
* to check it up here before changing the tree.
*/
if (el->l_tree_depth && ocfs2_is_empty_extent(&el->l_recs[0])) {
if (el->l_tree_depth && el->l_recs[0].e_int_clusters == 0) {
ocfs2_error(inode->i_sb,
"Inode %lu has an empty extent record, depth %u\n",
inode->i_ino, le16_to_cpu(el->l_tree_depth));
@ -3644,13 +3681,13 @@ start:
i = le16_to_cpu(el->l_next_free_rec) - 1;
range = le32_to_cpu(el->l_recs[i].e_cpos) +
le32_to_cpu(el->l_recs[i].e_clusters);
ocfs2_rec_clusters(el, &el->l_recs[i]);
if (i == 0 && ocfs2_is_empty_extent(&el->l_recs[i])) {
clusters_to_del = 0;
} else if (le32_to_cpu(el->l_recs[i].e_cpos) >= new_highest_cpos) {
clusters_to_del = le32_to_cpu(el->l_recs[i].e_clusters);
clusters_to_del = ocfs2_rec_clusters(el, &el->l_recs[i]);
} else if (range > new_highest_cpos) {
clusters_to_del = (le32_to_cpu(el->l_recs[i].e_clusters) +
clusters_to_del = (ocfs2_rec_clusters(el, &el->l_recs[i]) +
le32_to_cpu(el->l_recs[i].e_cpos)) -
new_highest_cpos;
} else {

19
fs/ocfs2/alloc.h
View File

@ -85,4 +85,23 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el,
u32 cpos, struct buffer_head **leaf_bh);
/*
* Helper function to look at the # of clusters in an extent record.
*/
static inline unsigned int ocfs2_rec_clusters(struct ocfs2_extent_list *el,
struct ocfs2_extent_rec *rec)
{
/*
* Cluster count in extent records is slightly different
* between interior nodes and leaf nodes. This is to support
* unwritten extents which need a flags field in leaf node
* records, thus shrinking the available space for a clusters
* field.
*/
if (el->l_tree_depth)
return le32_to_cpu(rec->e_int_clusters);
else
return le16_to_cpu(rec->e_leaf_clusters);
}
#endif /* OCFS2_ALLOC_H */

19
fs/ocfs2/extent_map.c
View File

@ -50,13 +50,15 @@ static int ocfs2_search_extent_list(struct ocfs2_extent_list *el,
int ret = -1;
int i;
struct ocfs2_extent_rec *rec;
u32 rec_end, rec_start;
u32 rec_end, rec_start, clusters;
for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {
rec = &el->l_recs[i];
rec_start = le32_to_cpu(rec->e_cpos);
rec_end = rec_start + le32_to_cpu(rec->e_clusters);
clusters = ocfs2_rec_clusters(el, rec);
rec_end = rec_start + clusters;
if (v_cluster >= rec_start && v_cluster < rec_end) {
ret = i;
@ -98,6 +100,15 @@ int ocfs2_get_clusters(struct inode *inode, u32 v_cluster,
eb = (struct ocfs2_extent_block *) eb_bh->b_data;
el = &eb->h_list;
if (el->l_tree_depth) {
ocfs2_error(inode->i_sb,
"Inode %lu has non zero tree depth in "
"leaf block %llu\n", inode->i_ino,
(unsigned long long)eb_bh->b_blocknr);
ret = -EROFS;
goto out;
}
}
i = ocfs2_search_extent_list(el, v_cluster);
@ -118,7 +129,7 @@ int ocfs2_get_clusters(struct inode *inode, u32 v_cluster,
ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
"record (%u, %u, 0)", inode->i_ino,
le32_to_cpu(rec->e_cpos),
le32_to_cpu(rec->e_clusters));
ocfs2_rec_clusters(el, rec));
ret = -EROFS;
goto out;
}
@ -130,7 +141,7 @@ int ocfs2_get_clusters(struct inode *inode, u32 v_cluster,
*p_cluster = *p_cluster + coff;
if (num_clusters)
*num_clusters = le32_to_cpu(rec->e_clusters) - coff;
*num_clusters = ocfs2_rec_clusters(el, rec) - coff;
}
out:

6
fs/ocfs2/file.c
View File

@ -1127,7 +1127,6 @@ static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
size_t count)
{
int ret = 0;
unsigned int extent_flags;
u32 cpos, clusters, extent_len, phys_cpos;
struct super_block *sb = inode->i_sb;
@ -1135,14 +1134,13 @@ static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
while (clusters) {
ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
&extent_flags);
ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len);
if (ret < 0) {
mlog_errno(ret);
goto out;
}
if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
if (phys_cpos == 0) {
ret = 1;
break;
}

2
fs/ocfs2/journal.h
View File

@ -390,7 +390,7 @@ static inline int ocfs2_calc_tree_trunc_credits(struct super_block *sb,
/* We may be deleting metadata blocks, so metadata alloc dinode +
one desc. block for each possible delete. */
if (tree_depth && next_free == 1 &&
le32_to_cpu(last_el->l_recs[i].e_clusters) == clusters_to_del)
ocfs2_rec_clusters(last_el, &last_el->l_recs[i]) == clusters_to_del)
credits += 1 + tree_depth;
/* update to the truncate log. */

19
fs/ocfs2/ocfs2_fs.h
View File

@ -155,6 +155,12 @@
#define OCFS2_FL_VISIBLE (0x000100FF) /* User visible flags */
#define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */
/*
* Extent record flags (e_node.leaf.flags)
*/
#define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but
* unwritten */
/*
* ioctl commands
*/
@ -283,10 +289,21 @@ static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = {
/*
* On disk extent record for OCFS2
* It describes a range of clusters on disk.
*
* Length fields are divided into interior and leaf node versions.
* This leaves room for a flags field (OCFS2_EXT_*) in the leaf nodes.
*/
struct ocfs2_extent_rec {
/*00*/ __le32 e_cpos; /* Offset into the file, in clusters */
__le32 e_clusters; /* Clusters covered by this extent */
union {
__le32 e_int_clusters; /* Clusters covered by all children */
struct {
__le16 e_leaf_clusters; /* Clusters covered by this
extent */
__u8 e_reserved1;
__u8 e_flags; /* Extent flags */
};
};
__le64 e_blkno; /* Physical disk offset, in blocks */
/*10*/
};